Improvement in cloth-cutting machines



F. KOCH & R. BRASS.v

. Cloth-Cutting Machines. No. 129,285. Pafenfedlu1y16,1s72.

UNITED STATES FFICE.

PAT

IMPROVEMENT IN CLOTH-CUTTING MACHINES.

Specification forming part of Letters Patent No. 129,285, dated July 16,1872.

Specification describing a new and ImprovedOloth-Cuttingllachine,invented by FREDRICH KOCH and ROBERT BRASS, ofWilliamsburg, in the county of Kings and State of New York.

In the accompanying drawing, Figure l is a side elevation of ourimproved cloth-cutting machine. Fig. 2 is a horizontal section of thesame on the line c c, Fig. l; and Fig. 3 a detail vertical section onthe line k k, Fig. 2, showling the parts on an enlarged scale. Fig. 4 isa detail vertical section on the line e k, Fig. 1.

Similar letters of reference indicate corresponding parts. v

This invention relates to a new machine for cutting cloth of suitablethickness by means of a reciprocating blade, having its cuttingedgeparallel to its line of motion. The invention consists chiefly in thearrangement, around the reciprocating cutter, of. a circular table whichcarries the feed mechanism, and which, when turned, causes 4also therotation of the cutter in equal degree, although it does not interferewith the up-and-down motion of the same. The invention also consists linthe arrangement of a yoke-shaped swivel-arm, which holds the upper partof the mechanism, such as the presser-foot, the top guide for thecutter, Ste., the said arm being swiveled so that it can be swung toeither side out of the way of the cloth which is being fed. This is animportant item, as it permits the cutting of large pieces on the machineand in suitable direction. Whenever the arm is in the way of the clothit can be easily carried clear of the same. The invention also consistsin a new and peculiar manner of imparting motion to the double-feed, andto a new combination of the concentric tubes that embrace thereciprocating cutter, all as hereinafter more fully described.

Ain the drawing represents the rigid supporting-frame of our improvedcloth-cutting machine. It is connected with or part of a horizontalplate, a, which is by preference sunk into and Hush with the table orplatform, along which the cloth to be cut is to be moved, aud whereon itis supported. This frame A is held stationary by suitable means, andcontains the bearings for the horizontal driving-shaft B, and in arms bb; also the bearings for a vertical shaft, C, which is by gear-wheels dd connected with the shaft B. The shaft B receives rotary motion by beltor other suitable means, and transmits it to the shaft O, and also to acrank, e, which, being at the end of the shaft B, connects, by a pitman,f, with a vertical rod, D, imparting reciprocating motion to the Same.The rod D projects through a tube, g, which is suspended from a circulardisk, E, Whose bearings or support are in the plate a.. The disk E is atits edge supported on the rabbeted edge of a circular opening eutthrough the plate a, as is fully indicated in Fig. 3. The under side ofthe disk E is toothed, so that it can be turned by means of a pinion, h,on an arbor, e', which hangs inthe frame A, as shown. To the under sideof the disk E are secured pendent ears jj, in which are the bearings ofthe arbor l, carrying the feed-wheels m m, both of which extend upthrough slots in the disk. The arbor l is a worm-wheel gearing' into aworm or screw, a, which is formed on the tubular shank of a gear-wheehe,that embraces the tube g loosely. The wheel o gears into a toothedwheel, p, which is mounted upon the shaft O, as shown, so that duringrotation of the shaft B the feed-wheels m m will be eontinuouslythoughslowly turned. The two armsA b b of the frame A are connected by a tube,q, that embraces the lower part of the tube g, as shown in Fig. 3. Thistube q, which is of .course rigid, serves as the axle or pivot for thelower arm of a U-shaped yoke-frame F, as shown, allowing said frame tobe freely turned thereon. The upper arm of the frame F carries avertical tube, r, whose axis is in line with that of the tube g, andwhich is flanged at both ends, as in Fig. 4, to be held in place. Theupper end of the rod D is guided in the said tube r. The cutter Gr'formspart of the rod D, being interposed between the sections of the same, soas to have the requisite length of stroke above the disk E. Thecutting-edge is between the two feedwheels and always remains there, agroove and feather, s, or equivalent device, connecting the rod D insuch manner with the tube g that the cutter will always revolve with thedisk E when the saine is turned by means of the arbor t'. To allow thisturning of the rod D the pitman connects with it by a knucklejoint, asin Fig. 3. H is the presser-foot, suspended from the top of the tube rand connected with a lever, t, whereby it can be raised, and with aspring, a, whereby it is forced down. The presser-foot proper consistsot' two small serrated rollers, o o, which bear directly upon thefeed-rollers m, or rather upon the cloth directly above thefeed-rollers.

The operation of the apparatus is simple and easy to understand. rlhecloth to be cut is placed upon the table a and disk E and fed tothereciprocating1 cutter, which can be turned, together with the feed,by means of the arbor t', to cause oblique or curved incisions in alldirections. The yoke-frame F bein g swiveled can be readily swung toeither side to be out of the way of the cloth.

In other cloth-cutting machines the support ofthe upper portion isalways rigid and frequently in the way of the cloth, which cannot be thecase in our machine on account oi' the swivel-frame F.

Having thus described our invention, we claim as new, and desire tosecure by Letters Patent- 1. The disk E, carrying the feed-wheels m mand embracing the reciprocating cutter G, whose axial rotations itregulates, substantially as herein shown Vand described.

2. The frame F, swiveled at the lower end and carrying` at its upper endthe presser-foot and upper cutter-guide, and made to operatesubstantially as set forth.

3. The combination of the feed-wheelsnwn, threaded axle Z, tubular worinfn, and tube y on the disk e, as shown and described.

4. The combination of the knuckle-pitman f with the reciprocating rodand cutter D Gr, tube g, disk E, tube q, and swivel-frame F, allarranged substantially as herein shown and described.

FREDRICH KOCH. ROBERT BRASS.

Witnesses:

T. B. Mosman, W. A. GRAHAM.

